I would also hazard a guess that they don’t have wall to wall carpeting full of decaying detritus and the teeny vermin that feed upon it.

Nor do they live in overheated and overcooled little boxes stacked like cargo containers that are so over insulated in the name of energy efficiency that there is virtually no air movement except that pushed by fan motors through filters that are not cleaned regularly enough.

Bare floors, fresh air and playing in the dirt is a sweet combination for healthy living.